<template>
  <div>
    <!-- 面包屑区域-->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 头部提示条 -->
      <el-alert
        title="添加商品消息"
        type="info"
        show-icon
        center
        :closable="false"
      >
      </el-alert>
      <!-- 进度条 -->
      <!-- 字符串数字+0 转为数值  数值+''转为字符串 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 表单区域 -->
      <el-form
        ref="addFormRef"
        :model="addForm"
        label-width="80px"
        :rules="addFormRules"
        :label-position="'top'"
      >
        <!-- tab栏区域 -->
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabsClick"
        >
          <!-- 基本信息 tab栏面板 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="{
                  expandTrigger: 'hover',
                  label: 'cat_name',
                  value: 'cat_id',
                  children: 'children',
                }"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :border="true"
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"> </el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
          <!-- action 图片上传的后台API地址
              on-preview 预览
          -->
            <el-upload     
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handelSucess"
            >
              <el-button size="small" type="primary">点击上传</el-button>             
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button class="Addbtn" type="primary" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
  title="预览"
  :visible.sync="previewDialogVisible"
  width="50%">
  <img :src="previewPath" alt="" class="previewImg">
</el-dialog>
  </div>
</template>

<script>
// 导入 lodash 官方推荐使用——来命名
import _ from 'lodash'
export default {
  name: "Add",
  data() {
    return {
      activeIndex: "0",
      // 添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_cat: [],
        // 图片的数组
        pics:[],
        // 商品的详情描述
        goods_introduce:'',
        attrs:[]
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      cateList: [],
      // 动态参数面板数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 上传图片的URL地址
      uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
      // 上传图片的请求头
      headersObj:{
        Authorization:window.sessionStorage.getItem('token')
      },
      // 预览图片的路径
      previewPath:'',
      previewDialogVisible:false
    };
  },
  created() {
    this.getCateList();
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$axios.get("categories");
      if (res.meta.status !== 200) {
        this.$message.error("请求数据失败！");
      }
      this.cateList = res.data;
      // console.log(this.cateList);
    },
    // 级联选择器中项变化，会触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat);
      // 选中的不是三级就清空
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    beforeTabLeave(activeName, oldactiveName) {
      // console.log('离开的标签页'+oldactiveName);
      // console.log('要进入的标签页'+activeName);
      if (oldactiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类！");
        return false;
      }
    },
    async tabsClick() {
      // console.log(this.activeIndex);
      // 访问动态参数面板
      if (this.activeIndex === "1") {
        const { data: res } = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        );
        if (res.meta.status !== 200) {
          this.$message.error("获取动态参数列表数据失败！");
        }

        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
        // console.log(res.data);
      }
      if (this.activeIndex === "2") {
        const { data: res } = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        );
        if (res.meta.status !== 200) {
          this.$message.error("获取静态属性列表数据失败！");
        }
        // console.log(res.data);
        this.onlyTableData = res.data;
      }
    },
    // 点击图片预览事件
    handlePreview(file){
    this.previewPath=file.response.data.url
    this.previewDialogVisible=true
    },
    // 处理移除图片的操作
    handleRemove(file){
      // console.log(file);
      const filePath=file.response.data.tmp_path
      const i=  this.addForm.pics.findIndex(x=>{
        x.pic===filePath
      })
      this.addForm.pics.splice(i,1)
      // console.log(this.addForm);
    },
    // 监听图片上传成功的事件
    handelSucess(response){
      // console.log(response);
      // 1、拼接得到一个图片信息对象
      const picInfo={pic:response.data.tmp_path}
      // 2、将图片信息对象push到pics中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm);
    },
    // 点击添加商品
    add(){
      // console.log(this.addForm);
      this.$refs.addFormRef.validate(async valid=>{
        if(!valid){
          this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        // 因为级联选择器 需要的是数组 直接添加把addForm.goods_cat变成字符串会影响 级联选择器
        // this.addForm 给页面上的元素进行双向绑定
       const form= _.cloneDeep(this.addForm)
       form.goods_cat=form.goods_cat.join(',')
     
      // 处理动态数据
      this.manyTableData.forEach(item=>{
        const newInfo={
          attr_id: item.attr_id,
          attr_value: item.attr_vals.join(' ')
        }
        this.addForm.attrs.push(newInfo)
      })
      // 处理静态属性
      this.onlyTableData.forEach(item=>{
        const newInfo={
          attr_id: item.attr_id,
          attr_value: item.attr_vals
        }
        this.addForm.attrs.push(newInfo)
      })
      form.attrs=this.addForm.attrs
      // console.log(form);

      // 发起添加请求
    const{data:res}= await this.$axios.post('goods',form)
    if(res.meta.status!==201){
      this.$message.error('添加商品失败！')
    }
    this.$message.success('添加商品成功！')
    this.$router.push('/goods')
      })
    }
  },
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.Addbtn{
  margin-top: 10px;
}

</style>
